Method of making rubberized parchment paper and the product thereof



rewrites oteemree or Yet-meme, DMTAWLTWE,

AND t se LEWIQ TG SATEZD l mwimg.

So as We ere 21o methet'l o t corgaoreting rubber with perch PNLSQEQ to produce 21 homogeneous prodiiot has heretofore heen devised:

Fibre has been with rehher commerce dissolved henzirie er iihze ts, but the pehetretieii of the fibre is iceiiy hii end the preeess is of mo eom= as" value. Sheet riihher has heeii Wieeiiized to sheets of i'ihre the meet suivuicehizimg process but he permeation of the ihre hy th riihher results we the ieminetiohs oiruhher and fibre ere er tremeiy iiehie to sepei'e'e.

mieenizeti fibre h retofore prothiceti has been huihy in com erisom its strength Wanting fiexihri ity emei'iiiieo factory in its eiectiieei resistiiig queiities.

The purpose of our invention is ch e new ertieie of eori g of rubber and tihre hemegeheeush pound-ed throughout the whie 7 he strong piiehie tiexroie ti rehie me etive rioh-oomieetor of moisture eiici ioity. e have discovered may he produced hy rubber ietex. This is e eolioimiei emulsion of rubber ili Wet/er eonteihe thtity per cent of pure Etiibbifl In the preferred method of out our intention We first dihite the ietex with about ten times the volume ofvrrajtet their thoreughiy mix e meeseieoi eluehtity of the precinct with refined peper piiip them coagulate with ehmi or en eoiti. "lihie that such article i a n iiitrociuotieh unite in e reticeietedi structure which forms e than him eroumoi the iridivioiueil hihree tihm is msohihie m Wet/er, The paper causes the coiioioiei pertieies of rehher to AFHQMJME 16,, 192? Serial No. M 0316.

is then out on a paper machine,

hiiose geietihizirig agent such es zinc 55 ehioride or siiiphurie acid intro511ieeti the excess eeiei removed and the paper eiried and The ietex is hiy ihcor ooreted /vith the peperstoch Wee: o e ietter is ch- Cm ic the st heating the tr g continued i toe ietex hes hee oughiy iiieorpoi Wei to he it is W the im'tftldtlfitw 65 The withh e paper sutiic e the ruhher' eohteht the time e-ri product iive per eeit iihished get KIM; fibre is erieiiy improved its flexihiiity ii "Us moistiire res rig emit dielectric erms. the addition of e larger o oitioii f the let-ex more fiexihie emit etter resistant product may he prochieeel hut We have ohteihedi the test results with e mihher content not exceeo'lirtg The Pieter: may else he applied peter which contains he rnihher or which met eoiiteir. shtheient EUibbfl e special purpose. may he done by goeper made iii the meet Why pessimg it threiieh at later; solution of eiizheieiit strength The LEELTJEE ehsorhs the and heeomes emiform'y with it, ssseti ti e and the eei- After eeegiiihetioh siirroimd the m hiiloee iihr The steps other than iheerperetieh the later with the p ter or paper are well mowm and iiee hot described were here rihed ehr irwehtiozi pertiohiei teem Wiii ho thtieretoori various s vemtioh mey he changed Witfrom the epirit thereeff and hence riot iimit ourseives to the precise construetieri set forth hut (so-insider We liberty to make such changes end a time fairly eome within the zip mieoi thee eieseriheii our irweritieh he pegie forms W eel- agulating the latex, washing u e what we claim as new and desire to secure by letters Patent is a 1. The herein described method of making rubberized fibre consisting in addin rubber latex to paper in the process of: manufacture, coagulating the latex and hydratin the cellulose,

2. l e herein described method of making rubberized fibre consisting in incorpo= rating rubber latex with paper pulp, coagulating the latex, making the product into paper and hydrating the paper.

3. 'llheherein descrlbed method of making rubberized fibre consisting in incorporating rubber latex with paper pulp, co

out the coagnt, making the product into paper and hydrating the paper.

d. The herein described method or making rubberized fibre consisting in im nating paper with rubber latex, coagulating moaarr calendering and hyto paper impregnating the paper with rubber latex, treating the, paper with a coagulent, then drying and hydrating the paper.

6. As a new article of commerce, a homogeneous compound of rubber and gelatinized fibre. v

In testimony whereof we have signed our names to this specification in the presence o1? two subscribing witnesses.

lllltllilAS (CLARENCE MARSHALL JAMES LEVIN illilclfilgltllll. Witnesses: 7

SAMUEL S. DnNNrsoN, Anrmnn H, ARMSTRONG. 

